John 13:5-7

Young's Literal Translation

⁵ afterward he putteth water into the basin, and began to wash the feet of his disciples, and to wipe with the towel with which he was being girded.

⁶ He cometh, therefore, unto Simon Peter, and that one saith to him, `Sir, thou -- dost thou wash my feet?'

⁷ Jesus answered and said to him, `That which I do thou hast not known now, but thou shalt know after these things;'